Implementing and strengthening a DMARC policy involves several steps:
Set Up SPF and DKIM: Before implementing DMARC, ensure that you have valid SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) records in place. These are prerequisites for DMARC. Create a DMARC Record: Publish a DMARC record in your DNS. Start with a policy of "none" to monitor email traffic without affecting delivery. Monitor Reports: Analyze DMARC reports to understand how your emails are being handled and identify any issues with unauthorized senders. Adjust Policy: Gradually move from a "none" policy to "quarantine" and eventually to "reject" as you gain confidence in the authenticity of your email traffic. Stay Updated: Regularly update your policies based on the insights gained from DMARC reports to continuously improve email security.